horse radish vs horseradish

horse radish and horseradish both are nouns.

Word	Noun	Adjective	Verb	Adverb
horse radish	Yes	No	No	No
horseradish	Yes	No	No	No

As nouns, horse radish and horseradish are synonyms defined as:

horse radish and horseradish: coarse Eurasian plant cultivated for its thick white pungent root

Other synonyms of horse radish include Armoracia rusticana, red cole.

horse radish (noun)	horseradish (noun)
coarse Eurasian plant cultivated for its thick white pungent root	grated horseradish root
	coarse Eurasian plant cultivated for its thick white pungent root
	the root of the horseradish plant; it is grated or ground and used for seasoning